BBM for Windows Phone has been long confirmed as coming and last we heard Blackberry CEO confirming a July release for it. Nawzil has now posted link of BBM private Beta on Twitter. You can certainly not install this private Beta without registration with BlackBerry. Below is what the app description reads like,

BBM for Windows beta. We’re getting ready to welcome Windows Phone users to the BBM community. BBM brings you together in the moment with friends and family through instant chats, voice calls, picture sharing, voice notes and more.

Seems, it will bring voice calls and voice notes along with its popular chat and picture sharing services. Good to see the official BBM app in Windows Phone store and here hoping that it comes out soon.

BBM beta link